Pb/Zn冶炼废渣中有价金属生物浸出条件优化

来源期刊:中国有色金属学报2008年第5期

论文作者:郭朝晖 程义 邱冠周 刘学端 潘凤开

文章页码:923 - 923

关键词:Pb/Zn冶炼废渣;有价金属;生物浸出;浸出条件优化

Key words:Pb/Zn smelting slag; metal values; bioleaching; optimization of bioleaching variables

摘    要:为提高生物浸出Pb/Zn冶炼废渣中有价金属的浸出率,利用正交设计,通过摇瓶实验,研究微生物浸出某Pb/Zn冶炼废渣过程中温度、pH值、废渣浓度及浸出时间等对废渣中Cu,Zn,In,Ga,Pb和Ag等有价金属浸出的影响。结果表明,在pH值为1.5、废渣浓度为5%、温度为65 ℃的优化浸出条件下生物浸出4d,Pb/Zn冶炼废渣中有价金属Cu,Zn,In和Ga的浸出率分别达到95.5%,93.5%,85.0%和80.2%,而Pb和Ag则主要以硫酸铅、黄钾铁矾类物质或硫化银形式富集在余渣中。

Abstract: In this study, the main variables involved in the bioleaching process include temperature, pH, pulp density and leaching time. These variables were studied through a shaking flask experiment by orthogonal design in order to improve the leaching rate of metal values, including Cu, Zn, In, Ga, Pb and Ag, from the Pb/Zn smelting slag. The results show that bioleaching rate of Cu, Zn, In and Ga in the Pb/Zn smelting slag under optimized conditions (pH 1.5, temperature 65 ℃, 5% pulp density and a leaching time of 4 d) is 95.5%, 93.5%, 85.0% and 80.2% respectively. Lead and silver, however, are mostly deposited in the leached residues with the forms of lead sulfate, argentojarosite-type or silver sulfide compounds, respectively.

基金信息:国家自然科学基金资助项目
中南大学博士后基金资助项目

相关论文

  • 暂无!

相关知识点

  • 暂无!

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号